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Moon & Mars Orbiting Spinning Tether Transport - Tethers Unlimited

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Appendix F: <strong>Tether</strong> Boost Facility Design Final ReportCmd and Data Handling 6 6 6- Computer- TLM Mux/Demux- Software- Operating SystemFlight Control Software 2 3 3 HASTOL Phase II = 2005 TRL- Orbital Mechanics straightforward- Equipment Control equipment undefinedNetworks Subsystem (NS) 8 8 8- Power Cables- Data CablesProximity Sensingrequirements unknownLIDAR 4 7 7 STS demos = 2005 TRLRadar 7 7 7requirements unknownPassive ReflectorsDocking Adaptor 2 3 3 HASTOL Phase II = 2005 TRLDifferential GPS (Beacon) 4 7 7 ProSEDS success = 2005 TRLTable 4.4 (cont’d). TRL assessments for Payload Accommodation Assembly subsystemsTRL 2001TRL 2005TRL 2010TETHERCommentsMechanical Subsystem (MS)- Survivable <strong>Tether</strong> Structure 4 5 5 Terminator <strong>Tether</strong> = 2005 TRL- <strong>Tether</strong> Material(s) 7 7 7 TiPs/SEDS = Today's TRL- Erosion Protection (AO & UV) 2? 2? 2? MSFC tests show serious issue of longtermSpectra survival. No coating identifiedyet.*Electrodynamic <strong>Tether</strong>- Bare Wire Anode 5 6 6 ProSEDS = 2005 TRL- High Voltage Insulation 4? 4? 4? incl. debris impact countermeasures- Erosion Protection (AO & UV) 2? 2? 2? Do we know about erosion of high-voltageinsulating material?*Possible solution is to use higher altitude for payload pickup, thereby reducing AO exposureTable 4.5. TRL assessments for <strong>Tether</strong> subsystemsF-18

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